>> there a lot of reasons for that, steve. i'm not going to enumerate all of them now except so to say every senator is entitled to be skeptical and to ask tough questions. they did and will and we will answer them. we will answer the questions and i will continue to talk to senators in the next days. i believe that what we are doing is and the president believes this very deeply. the best first step that will actually make israel safer, it will extend the break out time if we don't get this first step, not only will that break out time shrink, but iran may interpret the congressional reaction of wanting to increase sanctions as bad faith on our part and unwillingness to in fact negotiate and my drive the hard liners more into the commitment that they have to have the weapon. these are difficult judgments. you come to the table with our input and our information. i respect their positions, but we respectfully believe that the executive branch of government under the constitution deserves the right to negotiate and property the